Improvement in stop-motions for railway drawing-heads



0. A. TABO'R. Stop-Motion for Railway Drawing Heads.

No.199,878. Patented Jan. .29, 1878..

#LPEfERs, PHOTO-LITHOGRAPHER. WASHINGTON. D C

UNITED S A ES PATENT OFFICE.

CLARK A. TABOR, OF HOPE VALLEY, RHODE ISLAND.

IMPROVEMENT IN STOP-MOTIONS FOR RAILWAY DRAWING-HEADS.

Specificationforming part of Letters Patent N 0. 199,878, dated January 29,1878; application filed October 17, 1877.

To all whom it may concern: endof bolt F is beveled, so as to readily en- Be it known that I, G. A. TABOR, of Hope gage with the hook of latch Gr when the bolt Valley, in the county of Washington and State is pushed back forthe purpose of setting of Rhode' Island, have invented certain new the attachment; and the latch is kept in the and useful Improvements in Stop-Motions for proper position to take with the bolt by.a Railway Drawing-Heads; and I do hereby small spring, n, anda stop-pin, 0. declare that the following is afull, clear, and H is a lever, having its fulcrum in a bearexact description thereof, which will enaing. 19, secured to the back or under side of able others skilled in the art'to which it aptable A. The forward end of this lever is pertains to make and use the same, reference bent upward, as shown in Fig. 2, so as to enbeing had to the accompanying drawing, gage with the curved end of latch Gr. The which forms a part of this specification, and other end of lever H is pivoted in an arm, I,

in which which terminates in a socket, 19, into which a Figure l is a part elevation. Fig. 2 is an bent rod, K, is inserted, and kept in place by end view, and Fig. 3 is a top plan. a set-screw, q, thus admitting of the ready ad- Similar letters of reference indicate correjustment of rod K. The upper end of this sponding parts in all the figures. rod forms an oblong 100p, L, through which This invention relates to stop-motions for passes one end of the enlarged shaft of the railway drawing-heads; and-it consists in an upper compact roller 13, the loop or eye beimproved construction and combination of ing so constructed that the shaft will rotate parts, as hereinafter more fully explained, and freely within it. pointed out in the claims. M is an adjustable arm, secured upon rod In the drawing, A is the platform or table from which it passes sidewise and in front which supports the drawing-frame and its of the hinged arm 0, upon which the trumpet operating mechanism. (Not shown in the G is secured. drawing.) a a are the brackets supporting The belt-shifter N is pivoted in a bracket, the compact rollers B B, and O is the trumr, in the end piece of table A, a short rod, 8, pet for conducting the roving in between the passing through a perforation in the upper rollers. D is the shaft which operates the end or handle, which connects with a horimachinery, and d is a fixed and d a loose zontal lever-arm, '0, having its fulcrum at t, belt-pulley at the end of said shaft. The the other end of which projects out over the trumpet O is secured upon the end of an slot is, formed between the guide-strip 7c and arm, 2, pivoted at e. To the front side of the flanged plate E. table A is secured a plate, E, having two per- From the foregoing description, taken in forated bearings, f f, in which slides a bolt, connection with the drawing, the operation F, terminating at its inner end in a catch or of my invention will be readily understood. notch, 9. Around bolt F is placed a coiled The roving having been passed through the spring, h, abutting at one end against the trumpet, in between the compact rollers in the bearing f, and, at the other end, working usual manner, the machine is started byturnagainst a pin, 27, inserted transversely through ing the belt-shifter N so as to bring the belt the bolt. over upon the fixed pulley d. At the same 70 is a narrow strip or plate, screwed, or time bolt F is coupled, with its notched end otherwise secured, upon the top of the brackonto latch G, as shown in Fig. 1 of the drawets f f, so as to form a narrow slot, k, being, the projecting end of lever-arm 0 imtween itand the upper flange of plate E, in pinging, when bolt F is in this position, which the head of pin 1' slides, projecting up against the head of pin 6, which projects up above said slot, as shown. through the slot 70.

G is a latch, pivoted in a projecting plate, If, during the operation of the machine, the l, at m, and curved a little outward at one roving should break while passing through, end, while the other end forms a hook which or after it has passed through, the trumpet 0, takes with the notch g in bolt F. The notched the strain upon this, caused by the roving passing through its narrowopening, will cease, and the trumpet, with its hinged arm 0, will fly back from the head 13 B, thereby pushing against arm M, and consequently impelling rod K forward and downward, which again operates lever H, to which it is hinged by its socket p and arm I, so as to elevate its bent front end, thereby releasing latch G from its hold upon bolt F; and the latter, impelled by the coiled spring *7, will iiy back, carrying with it the pin 2', which works against the projecting endof the lever-arm 0, forcing this back so as to operate the belt-shifter in such a manner as to shift the belt from the fixed pulley d to the loose pulley d", which stops the machine. Similarly, if the roving should break before passing through the head, but after it has passed the trumpet, the upper compact roller B will descend upon the lower roller a distance corresponding to the thickness of the 'rdving,whichis sufificient to tiltrod K and lever H through the intermediate link I, 7 one end of the upper head projecting through theloop or bearing L, which is formed at the upper end of rod K for that purpose, thereby operating latch Gr, bolt F, lever-arm O, and

the belt-shifter N, in the manner already described, so as to instantly stop the machine until the broken ends of the roving have been reunited.

The object of making rod K adjustable, in themanner described, is to make it more or less sensitive to the fall or depression of the r 7 upper compact roller B when a sliver breaks,

and thereby insure perfect operation of the mechanism, whenever this contingency arises,

by having the loop or hearing L of said rod always in immediate contact with the roller by the fall or depression of which it is operated.

Having thus described my invention, I

claim and desire to secure by Letters Patent of the United States- 1. In a railway drawing-head, the plates E k, in combination with latch G, spring h, and

'bolt F, having pint" projecting up through stopping automaticallythe motion of the head on the breaking of the roving, consisting essentially of the adjustable rod K, arm I, lever H, latch Gr, bolt F, lever-arm O, and belt shifter N, all combined to operate substam V tially as and for the purpose herein shown and specified. V

In testimony that I claim the foregoing as 7 my own I have hereto affixed my signature in presence of two witnesses.

CLARK A. TABOR.

Witnesses WILLIAM B. Wnsrcorr, LOVINA RICHMOND. 

